Patent US3893485A successfully refreshed from Google Patents.
US3893485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulsation dampener
Assignee: Individual
•
Filing: 1973-06-25
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Granted: 1975-07-08
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Expires: 1993-06-25
Abstract
Abstract A pulsation dampener is presented which includes a bladder assembly having a bladder which retains its surface area and therefore its capability to dampen pulsations during pulsation dampening. The bladder is axially and longitudinally symmetrical. The bladder assembly comprises a bladder double sealed at both longitudinal ends by the combination of a bladder anchor bolt and a pressed metal end plate to prevent leakage. Pulsation causes the bladder to assume a clover leaf cross sectional configuration, thereby maintaining the bladder surface area constant regardless of pulsation. One end of the housing is machined so that that end may be pressed to gradually reduce its diameter toward the end while causing the wall thickness of those portions of diminishing diameter to remain essentially identical to the thickness of the unmachined unpressed wall portions of the housing.
Inventors
- 👤 Ernest W Loukonen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:10
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/04; F16L55/045; F16L55/05; F16L55/052; F16L55/053
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
216 words
A bladder assembly for a pulsation dampener comprising: a flexible cylindrical bladder with generally dome shaped end walls each having an opening on the axis of the bladder and a thickened annular rim portion surrounding said opening and forming about the opening an inner axially projecting sealing lip at the inner side of the respective end wall and an outer axially projecting sealing lip at the outer side of the respective end wall, two anchors each having a central portion extending through a respective bladder opening and an enlarged head portion seating against the inner side of the respective bladder end wall and containing an annular sealing groove receiving the respective inner sealing lip of the bladder, two anchor bolts each coaxially secured to a respective anchor and extending externally of said bladder, two generally dome shaped end caps each fitting over a respective end of said bladder and having an annular sealing shoulder surrounding and engaging the respective outer sealing lip of said bladder and a central opening through which the corresponding anchor bolt extends, a generally cylindrical screen extending between the two end caps in surrounding relation to said bladder and joined to said end caps, and one anchor bolt containing an axial passage through which the interior of said bladder may be pressurized.
Claim 2
Dependent Claim
216 words
A bladder assembly for a pulsation dampener comprising: a flexible cylindrical bladder with generally dome shaped end walls each having an opening on the axis of the bladder and a thickened annular rim portion surrounding said opening and forming about the opening an inner axially projecting sealing lip at the inner side of the respective end wall and an outer axially projecting sealing lip at the outer side of the respective end wall, two anchors each having a central portion extending through a respective bladder opening and an enlarged head portion seating against the inner side of the respective bladder end wall and containing an annular sealing groove receiving the respective inner sealing lip of the bladder, two anchor bolts each coaxially secured to a respective anchor and extending externally of said bladder, two generally dome shaped end caps each fitting over a respective end of said bladder and having an annular sealing shoulder surrounding and engaging the respective outer sealing lip of said bladder and a central opening through which the corresponding anchor bolt extends, a generally cylindrical screen extending between the two end caps in surrounding relation to said bladder and joined to said end caps, and one anchor bolt containing an axial passage through which the interior of said bladder may be pressurized.
Claim 3
Dependent Claim
41 words
The bladder assembly according to claim 1 wherein: each anchor is generally mushroom shaped, and a nut threaded on each anchor bolt for firmly clamping the respective anchor, bladder end wall and sealing lips and end cap together into sealing relation.
Claim 4
Dependent Claim
94 words
A Bladder assembly according to claim 2 in combination with: a generally cylindrical housing containing said bladder assembly and having an end wall closing one end of the housing and an opposite open end, and an opening in said housing communicating to the interior of said housing about said bladder, the nut threaded on said one anchor bolt comprising a disc shaped plug slidably fitting within and sealing said open housing end, said housing end wall has an inner coaxial recess receiving the other nut, and means releasably securing said plug in said housing.
Claim 5
Dependent Claim
29 words
The combination according to claim 3 including: a screw threaded in said housing end wall and engaging said other nut for pressing said bladder assembly tightly against said plug.
Claim 6
Dependent Claim
20 words
The combination according to claim 3 wherein: said housing end wall diminishes in thickness progressively toward said end wall recess.
Claim 7
Dependent Claim
48 words
The combination according to claim 3 wherein: said plug securing means comprises a locking ring assembly including separate parts seating against the outer side of said plug and engaging within an internal annular groove in said open housing end, and means releasably retaining said parts in said groove.
Claim 8
Dependent Claim
25 words
A bladder assembly according to claim 1 wherein: said bladder end wall openings have equal diameters and said anchors have the same size and shape.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |